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can i put grass seed on top of grass

Wondering if you can put grass seed directly on top of your existing lawn? Whether you’ve got bare patches, thinning grass, or just want a lusher, more resilient backyard, it’s a common question for Kiwi gardeners: can I put grass seed on top of grass? Understanding the dos and don’ts of overseeding is essential for a healthy, green lawn.

An immaculate Fine Fescue lawn in a modern and formal garden.

Fine Fescue Lawn Seed

5 from 1 customers

Fine Fescue lawn seed is ideal for homeowners seeking a lush, fine-textured lawn that thrives in shaded areas and requires minimal maintenance. This blend of Chewings Fescue and Creeping Red Fescue forms a dense, soft mat of grass with needle-like leaves, offering an aesthetically pleasing and comfortable surface underfoot. Suited for various soil and environmental conditions across New Zealand, Fine Fescue is perfect for creating elegant, low-traffic lawns.

From $48.49

A stunning Amenity Ryegrass lawn.

Amenity Ryegrass Seed (Lawn Seed)

5 from 4 customers

Rye Grass Seed lawns are quick to establish and features dark green leaves year-round. Our Amenity Rye Grass is a popular turf variety that is typically used where a hard-wearing lawn that establishes quickly is required such as sports grounds or high foot traffic areas. The grass seed should be spread at 50 grams per square metre when a the soil has been worked to a good tilth. Use 75 grams per square metre if you are over-sowing existing grass. Rye Grass seed lawns can be grown in all regions of NZ and is a popular and hardy option compared to other lawn seed options.

From $13.07

Dactylis glomerata plant with a cat.
Dactylis glomerata (Cat Grass)

Dactylis glomerata, commonly known as Cat Grass or Catnip Grass, is a popular grass that is loved by cats. It features flowing, green foliage held as...

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An exquisite Tall Fescue lawn.
Tall Fescue

Tall Fescue is an excellent lawn grass choice for New Zealand homeowners seeking a dark green, tough, and attractive lawn. It is widely used by ready...

From$13.46
Kikuyu lawn featuring a lush and dense tuf.
Kikuyu (Blended Kikuyu Lawn Seed)

A Kikuyu lawn is suited to warmer regions and coastal areas where hot and humid summers are less well suited to other turf species. The variety of...

From$52.42
Poa cita grass plants on a plateau overlooing the sea.
Poa cita

Poa cita, commonly known as Silver Tussock, is a clump-forming NZ native grass with delicate, green foliage that wafts gracefully in the breeze. It...

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An elegant Miscanthus sinensis grass with cream-coloured flower plumes and lush green foliage.
Miscanthus sinensis

Miscanthus sinensis is an ornamental grass that grows as a clump of narrow, arching, green leaves. The colouring gives a light silver-green effect to...

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Carex buchananii with lush brown foliage growing as a specimen plant in a rock garden.
Carex buchananii (Buchanans Sedge)

Carex buchananii, commonly known as Leatherleaf Sedge, is a striking New Zealand native grass-like plant with delicate, upright, copper-bronze...

From$11.50
Ophiopogon japonicus Silver Mist grass in a garden.
Ophiopogon 'Silver Mist' (Silver Mondo Grass)

Ophiopogon 'Silver Mist' is a dwarf silver Mondo Grass, and features fine, grass-like foliage that is variegated dark green and white. It typically...

From$6.95
A Kikuyu grass lawn bordered by a garden.
Pure Kikuyu Seed

Kikuyu grass is suited to warmer regions and coastal areas where hot and humid summers are less well suited to other turf species. The variety of...

From$71.40
Libertia paniculata plant with white flowers.
Libertia paniculata (Grass Flag)

Libertia paniculata is an elegant evergreen perennial admired for its fine, upright foliage and delicate white flowers that appear in airy clusters...

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Carex dipsacea plants as a mass planting in a garden.
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Carex dipsacea is a fine-leaved, clump-forming sedge native to New Zealand. It features slender, green to bronze-tinted foliage and grows to...

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Cymbopogon citratus (Lemongrass)

Cymbopogon citratus (aka Andropogon citratus), commonly known as Lemongrass Grass or Citronella Grass, grows as a clump and produces flavoursome and...

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Lomandra Frosty Tops with lush blue foliage in a garden.
Lomandra Frosty Tops

Lomandra Frosty Tops is a hardy, evergreen grass featuring elegant, blue-grey foliage and a soft, weeping form. Growing to around 50 cm tall and...

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Cyperus ustulatus growing in water.
Cyperus ustulatus (Giant Umbrella Sedge)

Cyperus ustulatus, commonly known as the Giant Umbrella Sedge, is a large and robust NZ native grass. It grows as a clump and produces dark green...

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Lomandra longifolia plant beside a path with lush, green foliage.
Lomandra longifolia (Basket Grass)

Lomandra longifolia (Basket Grass) is a resilient, evergreen ornamental grass native to Australia. Growing to approximately 60 cm in height and 65 cm...

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Carex flagellifera Green plant with lush and colourful foliage.
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Carex flagellifera Green is a NZ native, ornamental grass grown for its attractive foliage. It produces slender and lush, green leaves as it grows to...

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Typha orientalis, commonly known as Raupo, is a vigorous and erect, NZ native grass. It is found throughout New Zealand in shallow, fertile waters...

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Carex flagellifera Red plants.
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Carex flagellifera Red is a NZ native, ornamental grass grown for its colourful and attractive foliage. It produces slender and lush, copper-red...

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Imperata 'Red Baron' with colourful, red foliage
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A large Calamagrostis 'Overdam' grass with elegant, variegated foliage.
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Zebra grass (Miscanthus 'Zebrinus') leaves with cream and green stripes.
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Lomandra Shara displaying fabulous blue-green foliage and growing beside a gravel path.
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Lomandra Shara is an ornamental grass renowned for its delicate, dark green foliage and graceful arching form. Reaching approximately 60 cm in height...

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Lomandra Little Pal plants with lush green foliage.
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Lomandra Lime Tuff in a garden showing elegant foliage.
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Lomandra Green Allure plant with lush, green foliage.
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Fine Fescue Lawn Seed

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You might be interested in exploring related Latin Names - Carex, Dactylis, and Miscanthus, or related Categories - Grass Seed, Grasses, and Mondo Grass.

Search can i put grass seed on top of grass

Can I Put Grass Seed On Top Of Grass?

Yes, you can put grass seed on top of grass. This method, called overseeding, helps revitalise tired, thin, or patchy lawns by introducing new growth without having to start from scratch. Overseeding is especially popular in New Zealand where seasonal changes and high foot traffic can stress existing grass. However, simply scattering seed isn’t enough for a thriving result. Preparation and choosing the right variety—like Amenity Ryegrass Seed (Lawn Seed), Fine Fescue Lawn Seed, or Tall Fescue—make all the difference.

How to Successfully Overseed Your Lawn

To get the best results when putting grass seed on top of grass, follow these key steps:

1. Prepare Your Lawn

Mow your lawn shorter than usual to expose soil between grass blades. Rake vigorously or use a lawn scarifier to remove dead material and thatch. The more seed-to-soil contact you create, the better your new seedlings will establish.

2. Choose the Right Grass Seed

Different grass seed varieties perform best in different conditions. For high-wear lawns, Amenity Ryegrass Seed (Lawn Seed) is fast to establish and hardy. Fine Fescue Lawn Seed offers fine texture and shade tolerance. Tall Fescue is ideal for drought resistance and deep green colour. Even alternative grasses like Dactylis glomerata (Cat Grass) can be overseeded for pet-friendly spots, or try Kikuyu (Blended Kikuyu Lawn Seed) for warm coastal gardens.

3. Spread the Seed Evenly

Use a spreader for an even coverage or sow by hand for smaller areas. Apply at the recommended rate, ensuring an overlapping, crisscross pattern for consistent growth.

4. Water and Care

Keep the soil consistently moist until seedlings are well established. Avoid heavy traffic and mow only when new grass reaches about 7cm (3 inches).

Common Mistakes to Avoid

When thinking “can I put grass seed on top of grass,” remember that seed thrown on a dense lawn with heavy thatch won’t germinate well—exposing soil is essential. Neglecting to water, using the wrong seed, or fertilising at the wrong time can also hinder your results.

The Benefits of Overseeding

Adding grass seed on top of grass keeps your lawn thick and weed-resistant, improves colour and texture, and renews worn areas—all without expensive lawn replacement. Overseeding is a sustainable way to rejuvenate New Zealand lawns for seasons to come.

If you’re ready to revive your patch, browse our expert-recommended lawn seed options: try Amenity Ryegrass Seed (Lawn Seed), Fine Fescue Lawn Seed, or Tall Fescue for your next project.

Contact us

Whether you need assistance finding the plant you’re looking for or you simply want to know more about who we are and what we do, we invite you to get in touch with us today. A member of The Plant Company team will get back in touch as soon as possible.

Illustration of plant leaves.
You’ve probably heard of our garden favourites like Rosmarinus prostratus (Creeping Rosemary) and Griselinia 'Canterbury', but did you know we also grow hidden gems like Wisteria 'Lipstick', Hedera 'Silver Variegated', and Magnolia Strawberry Fields (Strawberry Fields Magnolia Tree)?
–The Plant Company

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